Sir Alex Ferguson's autobiography - ghost written by Paul Hayward - is finally released on Thursday, and today more details of the highly anticipated book have been revealed.

At a press conference this afternoon, Ferguson discussed some of the book's biggest revelations. It will examine his relationship with Roy Keane, with The Guardian explaining that Ferguson describes the former captain "as an erratic and terrifying figure, capable of frightening even him and, certainly, many players inside the dressing-room". In a row that ensued between the two following Keane's controversial MUTV interview, Ferguson explains "his eyes started to narrow... It was frightening to watch. And I'm from Glasgow."

Ferguson also reaffirms that Wayne Rooney asked to leave the club last year, despite the player's denials that he had done so. The former coach also expresses his fondness and admiration for David Beckham, but feels the player squandered his footballing abilities in pursuit of greater fame. He does, however, restate his support for Glazers' ownership of the club.

Another revelation from the press conference and book is that Ferguson twice turned down the opportunity to coach the English national team - first in 1999 and again in 2001.

However, Ferguson keeps relatively quiet on other subjects, including the infamous Rock of Gibraltar controversy, simply explaining that it didn't affect his coaching abilities.

Fergie barely mentions Rock of Gibraltar (the horse) in book. Explained he isn't allowed under terms of settlement with John Magnier

— Barry Glendenning (@bglendenning) October 22, 2013

Ferguson's book - simply entitled My Autobiography - will be available from Thursday.